High Pitched Whine (Not Rear End) - Page 5

thebigjimsho · #61 (**permalink**) 02-25-09, 03:57 PM

Quote:

Originally Posted by GMBOUND

So after you totalled it you found out how to fix the whine?
I told you all that talk of selling it wasn't good.
Thanks for the fix, i'm definately taking note of it.

Marty McFly didn't realize we went back in time...

CadiBlk · #62 (**permalink**) 03-02-09, 02:28 PM

I dropped the car off at the dealer this morning. Service tech that replaced my diff rode with me and soon as we got on the highway it kicked on (I was concerned that soon as I got it to the dealer it would go away) and the tech starts to say that there is a TSB on the bushing on the diff....

I cringed thinkin that they aren't going to be able to diagnose/fix it ( i have a new 06-07 diff put in last fall and i don't think it is the problem). I mentioned that a fellow enthusiast had a similar issue and that a replace of the drive shaft fixed it, the tech was not amused. I'll keep this updated if/when they get me fixed up.

CadiBlk · #63 (**permalink**) 03-02-09, 05:06 PM

Update. Dealer called and said that they replaced my diff...again (3rd). The whine I had definitely was not the normal diff whine, I've had "The" diff whine and it was textbook (light throttle 40-50mph and went away with clutch depressed), this "new" whine was odd. Only coming on at highway speeds but then continuing at low speeds after the initial issue enabler.

Well I will put some miles on this new diff and see if I can't get it to sing. My warranty is up on March 17th, so this mother best hold as I want to start warranty void modding asap!

CadiBlk · #64 (**permalink**) 03-02-09, 08:01 PM

Updated 2.0:

Halfway home from the dealer I am cruising along (72mph), then right on cue: eeeeEEEEEEEEE.

I told them that it wasn't the rear diff and sure enough replacing the rear diff did not fix it. This was a bit discouraging. I feel that the service department knowledge is limited to rear diff problems from the V, because they work on so few, so their mindset that it is a fix all. I am going to call them tomorrow and see what their plan B is. If it doesn't include the option of replacing the driveshaft (fixed ssmith100/Shane), then I will hear them out and decide if I want to try another dealer.

I just wish that I would have modded something to then have this noise so at least it would be mod hell, but instead this just started out of the blue for no apparent reason (hour 4 of a 5 hour trip). Joy.

V8V · #65 (**permalink**) 03-02-09, 08:48 PM

On my 4th trip to the dealer, they replaced my diff too. They didn't believe me that it was the center support bearing. The 5th trip in they had it for a week and a half. One new drive shaft, and good as new. If you can get them to have someone ride in the back seat, you can tell that it is coming from under the console, not the differential.

Good luck.

CadiBlk · #66 (**permalink**) 03-02-09, 09:06 PM

Quote:

Originally Posted by V8V

On my 4th trip to the dealer, they replaced my diff too. They didn't believe me that it was the center support bearing. The 5th trip in they had it for a week and a half. One new drive shaft, and good as new. If you can get them to have someone ride in the back seat, you can tell that it is coming from under the console, not the differential.

Good luck.

Thank you for the information. The tech did ride with me and I asked him if he wanted to sit in the back, but he said he could do the listening job from the front.....

Where there any visible signs on the center support bearing that should a problem? Just something that they could look at and see once they got it out? Thanks again.

BacDoc · #67 (**permalink**) 03-02-09, 09:34 PM

My V started making a "power steering" whine tonite. Coming from under the hood. My DD did something like this, whine came and went, turns out it was a bad bearing the tension pulley. I found out when it seized up.

CadiBlk · #68 (**permalink**) 03-02-09, 11:40 PM

Quote:

Originally Posted by BacDoc

My V started making a "power steering" whine tonite. Coming from under the hood. My DD did something like this, whine came and went, turns out it was a bad bearing the tension pulley. I found out when it seized up.

Ya, I've had bad idler pulleys before. I know that sound. This is def coming right from below my console. If they don't believe me I am going to take the center console out and drive it to the dealer so they can hear. It possible to drive it without the console? If nobody has tried it, i may be the first.

thebigjimsho · #69 (**permalink**) 03-03-09, 12:17 AM

Quote:

Originally Posted by CadiBlk

Updated 2.0:

Halfway home from the dealer I am cruising along (72mph), then right on cue: eeeeEEEEEEEEE.

I told them that it wasn't the rear diff and sure enough replacing the rear diff did not fix it. This was a bit discouraging. I feel that the service department knowledge is limited to rear diff problems from the V, because they work on so few, so their mindset that it is a fix all. I am going to call them tomorrow and see what their plan B is. If it doesn't include the option of replacing the driveshaft (fixed ssmith100/Shane), then I will hear them out and decide if I want to try another dealer.

I just wish that I would have modded something to then have this noise so at least it would be mod hell, but instead this just started out of the blue for no apparent reason (hour 4 of a 5 hour trip). Joy.

I drove to Lindsay in VA from Boston to have my last warranty work done. Best decision ever. But for you, I'd take it to Cadillac Tony and see if he can be a conduit to getting it fixed correctly.

CadiBlk · #70 (**permalink**) 03-03-09, 12:27 AM

I will contact Tony tomorrow after I talk to my service writer and see if they are going to do me a solid with the driveshaft. Is Tony's fu well versed with the V. I know I have seen that name around here. It is a lil under 3 hours to Plaza and I am not above making that drive.

thebigjimsho · #71 (**permalink**) 03-03-09, 12:31 AM

Tony just sold his V a few months ago and he is well versed in all things V. He's been around since the beginning and has seen every issue...

CadiBlk · #72 (**permalink**) 03-03-09, 12:38 AM

Thanks tbjs.

ewill3rd · #73 (**permalink**) 03-03-09, 09:53 AM

I think I know the noise in question, it probably is the center support bearing on the propshaft.
I have replaced 3 of them for this issue.
It is a unique sound and hard to pin down.

The first one was a complete mystery, from then on I knew the noise when I heard it.

mikemc · #74 (**permalink**) 03-03-09, 11:28 AM

Quote:

Originally Posted by ewill3rd

I think I know the noise in question, it probably is the center support bearing on the propshaft.
I have replaced 3 of them for this issue.
It is a unique sound and hard to pin down.

The first one was a complete mystery, from then on I knew the noise when I heard it.

I have this exact same problem and I am sure it is the carrier bearing in the driveshaft. I looked up the procedure to replace the bearing and the factory service manual refers to a kit that includes a new bearing, dust boot, o-ring and grease. Can someone tell me what the part number is for this kit so I can get this fixed? (I'm out of warranty and can do the work myself).

Thanks,
Mike McClure

Cadillac Tony · #75 (**permalink**) 03-03-09, 12:41 PM

Quote:

Originally Posted by CadiBlk

From the depths.

I am fortunate enough to enjoy this harmonizing tone coming from right rear area, randomly. It's not the diff, I've had that whine and am I on a fresh diff.

The tone I am referring to sounds like when you run a water facet or shower and you move the facet or shower head so that the flow is constricted.

It comes at highway speeds (>45). The tone will increase with speed, but at a certain point, the tone will reach constant even if accelerating . The tone will change while decreasing and using the brakes changes the tone. The tone will sometimes stay at speeds below 45 but at a stop the tone goes away.

I used the water example of the tone so people can get an idea of what it sounds like. I don't know if it is fuel pump like discussed or half shaft. I just used the water flow as example, my sound could be coming from metal on metal action.

The sound happens pretty randomly and I am interested to see if it comes when I am half full of fuel. I know this is an old thread, but I am hoping someone remembers a mention of a fix or is currently experiencing this. My warranty is up in a couple weeks and I would like to get this fixed. I don't want to extend the warranty in fear of this because I have plans for a few warranty voiding mods...

Sounds like a bearing noise to me- either the joint on the two-piece driveshaft or a rear wheel bearing. Tough to say without hearing it in person, but that's my guess.

*edit* I just went back and saw that your describe the sound as an "eeeeEEEEEE", and that wouldn't be a wheel bearing. Magic 8-Ball says "all signs point to driveshaft". I'll talk to the shop and see what's involved in diagnosing it.